Wayland support for Brightness

[bkbilly]

Big Update: Real Hardware Brightness Control

I’ve completely overhauled how brightness works! Instead of using a software trick xrandr to "fake" dimming by tinting your screen darker, the app now talks directly to your monitor's hardware. This means better colors, less power usage, and actual control over the backlight.

What’s New:

• Real Hardware Support: It now works with laptop screens and external monitors using DDC/CI (the standard protocol for screens).
• Universal: Since it talks to the hardware through the system kernel, it works perfectly on both X11 and Wayland without needing extra tools like xset or xrandr.
• Smart Detection: It automatically finds your monitors and gets their real names (like "Dell U2723QE").

⚠️ Heads Up: This is a Breaking Change!

Because I've switched from software "faking" it to real hardware control, the way you set values has changed:

Feature	Old Way (xrandr)	New Way (Hardware)
Range	0.1 to 1.0	0 to 100
Precision	Decimals (0.1)	Whole numbers (1, 2, 3...)
Quality	Software-tinted	True Hardware Backlight

Quick Fix for Permissions

If your brightness isn't moving, you just need to give your user permission to talk to the hardware:

• External Monitors: Add your user to the i2c group by running: sudo usermod -aG i2c $USER (then reboot!).
• Laptop Screens: You need to create a "udev rule" so the app can change the backlight files. Run this command: echo 'SUBSYSTEM=="backlight", RUN+="/bin/chmod 666 /sys/class/backlight/%k/brightness /sys/class/backlight/%k/bl_power"' | sudo tee /etc/udev/rules.d/backlight-permissions.rules Then apply it with: sudo udevadm control --reload-rules && sudo udevadm trigger.

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Inspired by the screen-brightness-control Python library.